Adolph g



March 16 1926. 1,576,519

A. G. KUPETZ COMBINED TYPEWRITING AND COMPUTING MACHINE Filed August 23, 1924 4 //71 e/7 far i Patented Mar. 16, 1926.

UNITED STATES 1,576,519 PATENT OFFICE.

ADOLIH G. KUIETZ, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO UNDERWOOD COM- PU'IING- MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Application filed August 23, 1924. Serial No. 733,693.

puting and typewriting machines, and more particularly to an improvement in the typedriving mechanism for a machine of this character, such that typing of the numbers, which are set up to be run into the wheels of the register of the machine, will be assured, and that any tendency to print a light or partial impression of the type or failure to print the same will be entirely overcome.

In machines of this nature, the typewriting mechanism is positioned above the computing mechanism, and the digit-keys of the typing mechanism operate indexing devices associated with a computing bar, forming a portion of the adding machine, and cause a numeral-printing type to be driven against a work-sheet, after which a general operator is used for running the number into the dial-wheels of the register. The indexing devices usually comprise a set of pins, each digit-key being capable of setting a pin in any denomination, and it is the practice to adjust the mechanism of the machine so as to insure setting of the pin on the computing bar before the type strikes the platen to print. It has been found in practice with this arrangement that the numeral pins are usually setup, but not infrequently the type-bars fail to reach the platen to print the necessary numeral. The operator, upon noting the absence of the numeral on the workheet, is apt to strike the key again and thereby cause an error in the calculating operation.

It is, therefore, a feature of the present inwent-ion to overcome this disadvantage by providing a sub-lever, which is pivoted to the key-lever and linked by means of the usual bell-crank to the type-bars. The keylever operates to impart an initial throw to the sub-lever, and after the movement of the key-lever has been arrested, the sublever continues to travel by its own momentum against. the action of suit-able resilient means to reach the platen, with sufficient force, to cause the ty e to be ro erl impressed upon the worli sheet. p p y Other features and advantages will heremafiemappear.

In the accompanying drawings,

Flgure l is a side elevation of a portion of a comblned computing and typewriting machine with the invention applied thereto and showing a type-bar and printing key in normal pos1t1on.

F igure 2 is a view similar to Figure 1, but showlng the position of a type-bar and assoclated parts of the machine upon an initial depresslon, and arrest of a printing key, one of the lndexing pins being shown depressed.

Figure 3 shows the position of a type-bar and type after being driven against the platen by the momentum of a sub-lever.

Figure 4 is a view of a key-lever and sublever disassembled for clearness of illustraion.

Figure 5 is a View representing the application of the present invention to all of the keys of an ordinary typewriting machine.

From each of the keys 12 depends a stem 13, WhlCh, when depressed, engages at its lower end, an arm 14 on a rock-shaft 15, there being one rock-shaft for each key 12. These rock-shafts 15 individually rock linkages 16, which are connected to arms 17 on the rock-shafts. Lower links or digitbars 18 are also connected through linkages 16 to the arms 17 and are depressed thereby for the purpose of depressing indexing pins 19, the latter being mounted in forwardly and rearwardly extending denominational pinbars 20. After a number is typed and its corresponding number pins are set, a general operator 21 is actuated by a suitable handle or gower means (not shown) and engages the epressed pins 19, and then, by means of racks 22 on the forward ends of pin-bars 20 meshin with suitable pinions (not shown) fixe to registers 23, the number is run into the dial-wheels of the register.

The foregoing description is of mechanism which has'heretofore been used in combined computing and typewriting machines, and its description here is given simply for a clear understanding of the manner in which the present invention, now to be described, isassociated therewith.

The present invention concerns a sub-lever 24 which is pivoted at 25 tothe key-lever 10, the sub-lever lying flat against the keylever throughout its length and following the general contour of the key-lever 10. Thesulrlever 24 carries a stud 25' which engages. a fork 26 of a bell-crank lever 27 to rock the same about a pivot 28, and thereby swinga type-bar 29 upwardly and rearwardly about 'a pivot 30, to cause type 31 toprint against a platen 32. A11 car 33,

.formed upon the under side of the sub-lever.

posed parallel with the side of the lever 10 and is sufliciently spaced therefrom to permit movement of the free end of the sub-,

lever 24 therewithin, the lower portion of the collar forming a stop 38 to limit the downward throw of the sub-lever. The free end 34 of the sub-lever is cut away, as indicated at 39, so as to permit a proper amount of movement of the same within the collar 37, and a weight 40 may be attached to the outer end of the sub-lever, the function of which will be later described. Upon striking the key 12 to rock key-lever 10 about its pivot 11, the stop 36, against which the.

free end 34' of the sub-lever 24 normally rests, will cause the sub-lever to move bodily with the key-lever. During this movement,

the stem 13 has been depressed to actuate the corresponding rock-shaft 15, and thereby effect the setting of an indexing pin 19 of the computing mechanism (see Figure 2),

the downward movement of the stem 13 being arrested as the pin is set. The motion thus initially imparted to the sub-lever 24 will cause the same to continue its movement beyond this point-by its own momentum and swing about its pivot a suflicient distance to cause the type to reach the platen to print the numeral, as illustrated in Fi ure 3, and the inertia of the weight 40 ai s the sub-lever to roperly actuate the rinting elements. The key-lever 12 when re eased will be returned to its normal position by the spring 33, which causes the free end 34 of the sub-lever to press upwardly against the stop 36 of the collar 37, thus both the key-lever and sublever'return to normal position'as a unit.

An suitable means for vertically adjusting the stem 13 may be provided, and in the present application is shown as a yoke 41 pivoted at 42 upon the key-lever ,10, and, throu h the medium of set-screws 43, adjustab e against the forward edge of the key-lever, the yoke may be moved about its pivot. The stem 13 is'pivoted to the oke at a point 44 disposed horizontally to the pivot 42, so that, when the yoke 41 is moved, the stem '13 is adjusted vertical] with respect to the arm 14 of the rock-sha 15, and by this means the relationship of the computing mechanism and printing elements may be properly adjusted.

Variations maybe resorted to Within the scope ofthe invention, and portions ofthe improvements-may be used without others,

Having thus described my invention, I claim:

1. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-key-levers arrested at the completion of their indexing strokes, a set of numeral-type-bar-operating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen.

2. In a combined typewriting and computing machine, the combination of in-- dexing mechanism including numeral-keylevers arrested at the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, a lost-motion connection being provided between said indexing keylevers and said type-bar-operating levers to permit such independent motion.

3. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-keylevers arrested at-the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, a lost-motion connection being provided between said indexing keylevers and said type-bar-operating levers to permit such independent motion, said type-bar-operating levers lying side by side with the indexing key-levers, and pivoted respectively thereto.

4. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-keylevers arrested at the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, a lost-motion connection being provided between said indexing key-levers and said type-bar-operating levers to permit such independent motion, and resilient means for maintainin normal relation be tween each indexin ey-lever and its associated type-operatmg lever.

5. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-keylevers arrested at the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, a lost-motion connection being provided between said indexing key-levers and said type-bar-operating levers to permit such independent motion, said indexing key-levers pivoted at their rear ends and each type-bar-operating lever lying ,compactly alongside of its associated indexing lever and pivoted at its rear end thereto.

6. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-keylevers arrested at the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, a platen, said type-operating levers and the: type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, a lost-motion connection being provided between said indexing key-levers and said type-bar-operating levers to permit such independent motion, and returning springs connected to said type-operating levers to return the same together with said indexing key-levers. J

7. /In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-keylevers arrested at the completion of their indexing strokes, a set of numeral-type-baroperating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, yokes being provided upon the in-- dexing key-levers in which the type-operat ing levers play, and whereby limited relative movement of the indexing key-levers and the type-operating levers is permitted.

8. In a combined typewriting and computing machine, the combination of indexing mechanism including numeral-key levers arrested at the completion of their indexing strokes, a set of numeral-type-bai operating levers operable by said indexing levers, and a platen, said type-operating levers and the type-bars movable independently of the indexing keys -after the arrest of the latter, whereby the type-bars subsequently continue in motion and strike against the platen, means being provided for e ecting relative adjustment between the indexing key-levers and the indexing devices operable thereby, to insure accurate setting of the indexing devices by the keys.

ADOLPH G. KUPETZ. 

